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(No Model.) 4 Sheets-Sheet 1.

J. KEEN, T. R. MARRIOTT 8; Pi COOPER.

VELOOIPBDB DRIVING GEAEL.

No. 491,429. Patented Feb '7, 1-893.

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Patented Feb. 7, 1898.

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(N0 Model.) 4 Sheets-Sheet 4.

J; KEEN, T. R. MARRIOTT a; F. COOPER. VBLOGIPEDE DRIVING GEAR.

' N0. 491,429, Patented Feb. 7, 1893.

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UNITED STATES PATs Nr rrrcst JOHN KEEN, THOMAS RUSI'IFORTII MARRIOTT, AND FREDERICK COOPER, OF

LONDON, ENGLAND.

VELOGIPEDE DRlVlNG-GEAR.

SPECIFICATION forming part of Letters Patent No. 491,429, dated February 7, 1893.,

Application filed February 26, 1892. Serial No. 422,910. (No model.)

To aZZ whom it may concern.-

.Be it known that we, JOHN KEEN, residing at Long Ditton, in the county of Surrey, and Tnoruns Rusnron'rn MARRIOTT and FRED- ERICK COOPER, both of Holborn Viaduct, in the city of London, England, subjects of the Queen of Great Britain, have invented certain new and useful Improvements in Velocip'ede Driving- Gear of which the following is a l o specification.

The object of the present invention is to combine the sun and planet gear with a rotary crank and pedal for the driving gear of velocipedes in a simple and effective manner.

And in order that our said invent-ion may be clearly understood and readily carried into eitect, we will proceed, aided by the accompanying drawings, fully to describe the same.

In all the figures like parts are indicated by similar letters of reference.

Figure 1 is a side view, and Fig. 21s an end view, of part of an ordinary bicycle with our improved gear applied thereto. Fig. 3 is a section thereof taken through the center of 25 the hub with the chain removed, and Fig. 4 is a cross section taken on the line 1-1 of 3. Fig. 5 represents a slight modification.

a is the hub of the driving wheel and b is a toothed wheel fixed rigidly thereto.

c c are the cranks mounted on the opposite ends of an inner spindle d, which runs freely through the hub of the driving wheel and is carried in suitable ball bearings. The crank 5 c carries a stud 8 passed therethrough and provided with a nut e by which it is held firmly in position. Upon this stud e is loosely mounted a toothed wheel f, (the planet wheel,) which gears into the toothed wheel h fixed rigidly on the hub of the driving wheel. g g are the arms of the fork carrying the driving wheel. On the ends of these arms are fixed suitable ball bearings g and g On the bearing 9 we in rigidly a chain wheel h,

and to the toothed wheel, (01planet wheel) f, on the crank c, is fixed another chain wheel 2'. Around these chain wheels 77. and z is passed a chain j, which is held fast by the chain wheel h on the fork bearing g hen the crank is revolved, the chain jgives rotary motion to the planet wheel f through the chain wheel 2' fixed thereto, and this planet wheel f, gearing with the toothed wheel I) fixed on the hub of the driving wheel a, causes the driving wheel to revolve more quickly 5 5 than the cranks.

In the drawings we have shown the fixed chain wheel h with six teeth and the loose chain wheel 2' with seven teeth, while the toothed wheels I) and f have respectively twenty-four and twenty teeth, but the proportions of the various wheels maybe varied according to the gear desired.

The planet wheel f and the chain wheel 2' are mounted on suitable ball bearings on the 6 stud e.

The spindle cl is mounted at one end in the ball bearing 9 and at the other end it runs upon balls carried in the interior of the hub a.

The hub is mounted at one end in the double ball bearings g and the other end upon arow of balls running upon acone on the spindle (I.

3y this construction of parts we are enabled to obtain very long bearings for the hub and spindle. 7

The chain wheel h and the bearing 9 are divided horizontally, and each half chain wheel h and half bearing g is made in one piece of metal or they are fixed rigidly together, the upper and lower parts being connected together firmly by nuts and bolts, as shown in the drawings.

In Fig. 5 the sun andplanet wheels are omitted for the sake of clearness. In this case the chain wheels and chain are replaced by toothed wheels t" and h, and a carrying or intermediate pinion j, mounted upon a stud k carried by an enlargement formed upon the side of the crank, is used for communicating motion from the fixed wheel h to the wheel 'i'.

lVe are aware that sun and planet gear has been applied to bicycles in various forms and we therefore do not claini'the same broadly.

That we claim, and desire to secure by Letters Patent, is: 5

1. In velocipede driving gear, the combination of the fork bearings, the hub of the driving wheel journaled in one of them, the crank spindle journaled in the hub and in the other fork-bearing, a sun-wheel fixed on the hub, a too planet-Wheel on the crank meshing with the sun-Wheel, a Wheel fixed rigidly to the forkbearing, a Wheel fixed to the planet-wheel, and means for communicating motion to the planet-Wheel, through the medium of said rigid wheel, substantially as described.

2. 1n Velocipede driving gear, the combination of the fork-bearings, the hub of the driving-wheel journaled in one of them, the crankspindle jonrnaled in the hub and in the other fork-bearing, a sun-Wheel fixed on the hub, a planet-Wheel on the crank meshing With the sun-Wheel, a Wheel fixed rigidly to the forkbearing, a wheel fixed to the planet-wheel, and a chain passing around the wheels fixed Vitnesses:

B. J. B. MILLS, CLAUDE K. MILLS, 23 Southampton Buildings, London, WY 0.,

Patent Agents. 

